Why microcap stocks trade thin, and how to measure it

Two numbers that matter

The first is turnover: median daily dollar volume divided by market value, usually shown in basis points. It lets you compare a $60 million company with a $600 million one on the same scale.

The second is days to turn the register: shares outstanding divided by median daily share volume. It says how many trading days it would take for every share to change hands once.

Use the median, never the average. One day with a press release or an index change can move the average for months. The median is the day a fund actually trades in.

What the range looks like

Across the US-listed companies Krypton AI measured in September 2026, days to turn the register ran from 29 trading days to more than 2,400. At the slow end, the whole register changes hands about once every ten years.

Among companies under $500 million, the ones an analyst covers trade a median of $1.05 million a day, and the ones nobody covers trade $157,000. The gap is the reason liquidity and coverage move together.

Why it keeps funds away

A fund that wants 2% of a $100 million company needs $2 million of stock. At $150,000 a day it can only buy a fraction of that without moving the price, and it has to believe it can sell just as slowly.

Quantitative funds trade on models and screens. They buy what they can trade, so they do not solve thin trading for a company.

Float is part of the answer

Low volume is sometimes a float question before it is an attention question. If directors, officers and one or two strategic holders own a large block, less stock is left to trade.

Institutional stock is float. Index funds and active funds both sell. The defensible measure is shares outstanding less the proxy's director and officer group, less any strategic holder who does not trade.

When the float is small for a good reason, say so. A company that publishes its float and explains it gives a fund one less thing to work out alone.

What moves it

Volume follows people who have a reason to own the stock. That means more funds that know the story, analysts who compare it with peers, and individual investors who can find something to read about it. None of it is fast, and a company can track all of it: turnover against peers, days to turn, and how many funds that pick stocks own it.